What is gsonfactory?

getactivity/gsonfactory — explained in plain English

Analysis updated 2026-07-19 · repo last pushed 2026-07-11

★ 775JavaAudience · developerComplexity · 2/5ActiveSetup · moderate

Mindmap

mindmap
  root((repo))
    What it does
      Prevents app crashes
      Handles JSON mismatches
      Preserves Kotlin defaults
    How it works
      Wraps Gson library
      Converts bad values
      Skips invalid fields
    Use cases
      Unpredictable backends
      PHP backend teams
      Production crash prevention
    Transparency
      Throws errors in dev
      Logs errors in production
      Reports to Bugly
    Tech stack
      Java
      Kotlin
      Gson
      Android

mindmap root((repo)) What it does Prevents app crashes Handles JSON mismatches Preserves Kotlin defaults How it works Wraps Gson library Converts bad values Skips invalid fields Use cases Unpredictable backends PHP backend teams Production crash prevention Transparency Throws errors in dev Logs errors in production Reports to Bugly Tech stack Java Kotlin Gson Android

What do people build with it?

USE CASE 1

Prevent app crashes when a backend sends a number where the app expects a true/false value.

USE CASE 2

Preserve Kotlin default values that Gson would otherwise overwrite with null.

USE CASE 3

Log and report data mismatches to monitoring tools in production without crashing.

USE CASE 4

Catch backend data bugs during development with visible error callbacks.

What is it built with?

JavaKotlinGsonAndroid

How does it compare?

	getactivity/gsonfactory	elder-plinius/v3sp3r	peng-zhihui/bluetoothtouch
Stars	775	1,013	533
Language	Java	Java	Java
Last pushed	2026-07-11	—	2021-07-09
Maintenance	Active	—	Dormant
Setup difficulty	moderate	hard	moderate
Complexity	2/5	4/5	2/5
Audience	developer	developer	general

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · moderate Time to first run · 30min

Requires a Kotlin environment and specific Gson versions, plus build configuration to prevent issues with newer Android build tools.

So what is it?

GsonFactory is a tool for Android developers that stops apps from crashing when the backend server sends unexpected data. In mobile development, apps regularly receive data from servers in a format called JSON, and they use a popular library called Gson to read it. The problem is that Gson is very strict, if the server sends the wrong type of data for a field, the app crashes. This project wraps around Gson to handle those mismatches gracefully, so a single bad response from a server doesn't bring down the whole app. When the backend sends data that doesn't match what the app expects, this framework either skips that field or converts the value to something usable, rather than throwing an error. For example, if the app expects a true/false value but the server sends a number, the framework treats any non-zero number as true. If the app expects a whole number but receives a decimal, it rounds it down. It also handles tricky cases in Kotlin code, where Gson normally overwrites a developer's carefully chosen default values with null, causing crashes. The framework ensures those defaults are preserved. This tool is aimed at Android developers, especially those working with unpredictable backends. The author specifically calls out teams whose servers are written in PHP, where messy data structures are apparently common, but also shares a story of a Java-based backend that still caused over three million reported Gson errors. Any Android team that wants a safety net against backend bugs would find this useful, since it provides a way to catch and log data errors without crashing the app in production. What's notable is the approach to transparency: developers don't have to worry about silently hiding backend bugs. The framework includes a callback system so that during development, mismatches still throw visible errors, and in production, they can be logged and reported to monitoring tools like Bugly. The tradeoff is that it requires a Kotlin environment and specific Gson versions, and developers need to add configuration to prevent certain build issues on newer Android tools.

Copy-paste prompts

Prompt 1

I'm building an Android app using Gson and my PHP backend sometimes sends unexpected data types that crash my app. How do I set up GsonFactory to gracefully handle these mismatches instead of crashing?

Prompt 2

My Kotlin data classes have default values but Gson keeps overwriting them with null when the backend omits a field. How does GsonFactory fix this, and what configuration do I need?

Prompt 3

I want Gson mismatches to throw errors during development but only log them in production and report to Bugly. How do I configure GsonFactory's callback system to do this?

Prompt 4

What Gson versions and Kotlin environment does GsonFactory require, and what build configuration do I need to avoid issues with newer Android build tools?

Frequently asked questions